diff --git a/src/emi.js b/src/emi.js
index 292a9ad4..b6ddebf3 100644
--- a/src/emi.js
+++ b/src/emi.js
@@ -60,7 +60,7 @@ function Loan (amount, installmentsNumber, interestRate) {
 const getNextInstallment = (
   amount, installmentsNumber, interestRate, principalSum, interestSum
 ) => {
-  const monthlyInterestRate = interestRate / (12 * 100)
+  const monthlyInterestRate = interestRate / (12 / 100)
 
   const irmPow = Math.pow(1 + monthlyInterestRate, installmentsNumber)
   const installment = rnd(amount * ((monthlyInterestRate * irmPow) / (irmPow - 1)))